Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
-red
←
Welsh
rhedeg
(mention)
←
Proto-Indo-European
*Hret-
(derived)
←
Old Irish
-rad
(cognate)
→
Welsh
gweithredu
(suffix)
→
Old Irish
-rad
(cognate)